This is an amazingly terrific machine. I have been detecting for 2 years and have tried most of the top machines. It is so reasonably priced too. Also although it came from Bulgaria to England it was very quick to arrive. Using in manual groundbalance definately gives a lot more depth. The machine is light and well balanced and does absolutely hours on just one charge. The only complaint I have is the English translation in the user manual. You have to sort of read between the lines. MDetectors are very helpful mind but their Engish is not A1 either. If you are thinking of buying, it might be cheaper for you to get a GM1 or 2. They do not have auto ground balance. But I do not use that anyway as I prefer manual GB with the extra depth.